#!/bin/bash
# SPDX-License-Identifier: LGPL-3.0-or-later
# See Notices.txt for copyright information
set -e
export ANTLR4_TOOLS_ANTLR_VERSION=4.13.2
cd "$(dirname $0)/.."
pip -q --require-virtualenv install \
    antlr4-python3-runtime=="$ANTLR4_TOOLS_ANTLR_VERSION" \
    antlr4-tools==0.2.2
(cd takentaal; antlr4 -Dlanguage=Python3 -o takentaal takentaal.g4)
cat <<'EOF' > takentaal/takentaal/__main__.py
from antlr4 import *
from antlr4.error.ErrorListener import ErrorListener
from .takentaalLexer import takentaalLexer
from .takentaalParser import takentaalParser
import sys

class MyErrorListener(ErrorListener):
    def __init__(self, filename):
        self.filename = filename

    def syntaxError(self, recognizer, offendingSymbol, line, column, msg, e):
        print(f"{self.filename}:{line}:{column} {msg}", file=sys.stderr)

def main():
    filename = sys.argv[2]
    parser = takentaalParser(CommonTokenStream(takentaalLexer(
        FileStream(filename, encoding="utf-8"))))
    parser.removeErrorListeners()
    parser.addErrorListener(MyErrorListener(filename))
    getattr(parser, sys.argv[1])()
    if parser.getNumberOfSyntaxErrors() > 0:
        sys.exit(1)
main()
EOF
touch takentaal/takentaal/__init__.py

function check_plan()
{
    python3 -m takentaal.takentaal takentaal_v1_0 "$1"
}

function check_amendment()
{
    python3 -m takentaal.takentaal amendment_v1_0 "$1"
}

function check_progress()
(
    set -E
    filename="$1"
    mapfile -t lines < "$filename"
    function next_line() {
        eof=$((++line_index >= ${#lines[@]}))
        line="${lines[line_index]}"
    }
    line_index=-1
    function diag() {
        local msg_line_index kind="$1"
        if [[ "$2" =~ ^"-line_index="([0-9]+)$ ]]; then
            ((msg_line_index = ${BASH_REMATCH[1]}))
            shift
        else
            ((msg_line_index = line_index))
        fi
        shift
        echo "$filename:$((msg_line_index + 1)): $kind $@" >&2
    }
    function error() {
        diag "error:" "$@" >&2
        exit 1
    }
    any_errors=0
    function nonfatal_error() {
        diag "error:" "$@"
        any_errors=1
    }
    trap error ERR
    next_line
    function match_lines() {
        for regex in "$@"; do
            eval '[[ "$line" =~ '"$regex"' ]]' || error "expected $regex"
            next_line
        done
    }
    function skip_until_item() {
        local missing="$1"
        until [[ "$line" =~ ^[[:space:]]*[-#] ]]; do
            if ((eof)); then
                [[ -z "$missing" ]] || error "missing $missing"
                return
            fi
            next_line
        done
    }

    [[ "$filename" =~ (^|'/')'nlnet-'('template'|2[0-9][0-9][0-9]-[0-9][0-9]-[0-9]+)'/progress.md'$ ]] || error "bad filename"
    nlnet_id="${BASH_REMATCH[2]}"
    [[ "$nlnet_id" != "template" ]] || nlnet_id="YYYY-MM-ID"

    match_lines \
        "^'<!--'$" \
        "^'SPDX-License-Identifier: LGPL-3.0-or-later'$" \
        "^'See Notices.txt for copyright information'$" \
        "^'-->'$" \
        "^'# NLnet $nlnet_id Grant Progress'$" \
        "^$"

    skip_until_item "top level grant header"
    [[ "$line" =~ ^"# &euro; "([0-9]+)" "[^[:space:]] ]] || error "expected: # &euro; <number> <grant name>"
    ((grant_amount = ${BASH_REMATCH[1]}))
    ((grant_line_index = line_index))
    tasks_total=0
    next_line
    skip_until_item "first task"
    until ((eof)); do
        [[ "$line" =~ ^"## &euro; "([0-9]+)" "[^[:space:]] ]] || error "expected: ## &euro; <number> <task name>"
        ((task_amount = ${BASH_REMATCH[1]}))
        ((tasks_total += task_amount))
        ((task_line_index = line_index))
        next_line
        skip_until_item
        subtasks_total=0
        until ((eof)); do
            subtask_expected="expected: - &euro; <number> [Issue #<N>](https://git.libre-chip.org/libre-chip/grant-tracking/issues/<N>) <subtask name>"
            [[ "$line" =~ ^([#-]+)" &euro; "([0-9]+)" "[^[:space:]] ]] || error "$subtask_expected"
            [[ "${BASH_REMATCH[1]}" =~ ^[^'#'] ]] || break
            [[ "$line" =~ ^"- &euro; "([0-9]+)" [Issue #"([0-9]+|"N")"](https://git.libre-chip.org/libre-chip/grant-tracking/issues"('/'([0-9]*|"N"))?") "[^[:space:]] ]] || \
                error "$subtask_expected"
            ((subtask_amount = ${BASH_REMATCH[1]}))
            ((subtasks_total += subtask_amount))
            issue_number="${BASH_REMATCH[2]}"
            issue_number2="${BASH_REMATCH[4]}"
            [[ "$issue_number" != "N" ]] || [[ "$nlnet_id" = "YYYY-MM-ID" ]] || nonfatal_error "issue number must be set"
            [[ ( "$issue_number" = "N" && -z "$issue_number2" ) || "$issue_number" = "$issue_number2" ]] || \
                nonfatal_error "issue number in link name must match issue number in url"
            next_line
            skip_until_item
        done
        (( subtasks_total == task_amount )) || \
            nonfatal_error -line_index="$task_line_index" "task's amount ($task_amount) doesn't match sum of subtasks' amounts ($subtasks_total)"
    done
    (( tasks_total == grant_amount )) || \
        nonfatal_error -line_index="$grant_line_index" "grant's amount ($grant_amount) doesn't match sum of tasks' amounts ($tasks_total)"
    ((eof)) || error "extra tokens"
    exit $any_errors
)

any_errors=0
for nlnet_dir in nlnet-*/; do
    for file in "${nlnet_dir}"*; do
        case "${file##*/}" in
        plan.txt)
            check_plan "$file" || any_errors=1
            ;;
        plan-amendment-*.txt)
            check_amendment "$file" || any_errors=1
            ;;
        progress.md)
            check_progress "$file" || any_errors=1
            ;;
        *)
            echo "unknown file: $file" >&2
            any_errors=1
        esac
    done
done
exit $any_errors